Nearly 4 million titles and over 6 million volumes digitized by major research libraries. Many of the titles are the ones digitized by the Google Books project but the collection also includes many non-Google titles. Intended for use by academic researchers.
Search the full text of millions of books digitized by Google from major academic libraries. Most pre-1923 texts are available in full and can usually be downloaded as pdf files.
A project of the Internet Archive which contains nearly 2 million full-text ebooks. A smaller collection than Google Books or Hathi Trust but it sometimes has volumes unavailable elsewhere.